import numpy as np
import matplotlib.pyplot as plt

x1 = [0.5, 0.625, 0.75, 0.875, 1, 1.25, 1.5, 1.75, 2, 2.5, 3, 3.5, -0.5, -0.625, -0.75, -0.875, -1, -1.25, -1.5, -1.75, -2, -2.5, -3, -3.5, 0]

x2 = [0.25, 0.125, 0.375, -0.25, -0.125, -0.375]

y1 = np.zeros([len(x1)])
y2 = np.zeros([len(x2)])

plt.plot(x1, y1, 'ro')
plt.savefig("B1.png")

plt.plot(x1,y1,'ro')
plt.plot(x2,y2,'bo')
plt.savefig("B2.png")
